CN105238055A - Motor slot wedge heat-resistance insulation composite material and preparation method thereof - Google Patents
Motor slot wedge heat-resistance insulation composite material and preparation method thereof Download PDFInfo
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Abstract
The present invention discloses a motor slot wedge heat-resistance insulation composite material, wherein the raw materials comprise a silicone rubber, low density polyethylene, dodecafluoroheptyl methacrylate, an ethylene propylene diene monomer, a hydrogenated nitrile butadiene rubber, polyacetylene, nanometer calcium carbonate, nanometer montmorillonite, silicon carbide, carbon fibers, nanometer boron nitride, a metal composite filler, polyethylene wax, chlorinated paraffin, a coupling agent, stearic acid, stannous octoate, decabromodiphenyl oxide, expanded graphite, lanthanum stearate and a vulcanizing agent. The present invention further provides a preparation method of the motor slot wedge heat-resistance insulation composite material, wherein the preparation method has characteristics of simple process and mild conditions. The obtained composite material of the present invention has characteristics of good heat dissipating, excellent heat resistance, excellent insulation performance, and long service life.
Description
Technical field
The present invention relates to insulating material technical field, particularly relate to a kind of motor slot wedge heat resistant insulation composite and preparation method thereof.
Background technology
Bamboo is the material that existing motor slot wedge is conventional, and because bamboo exists the defect of thermotolerance and poor fire, there is thermotolerance, flame retardant resistance with the motor slot wedge that it is made is not very desirable defect.In order to be applicable to the needs of all kinds and insulation level motor trough wedge, people continually develop out various new insulation material for making motor slot wedge, and the synthetic rubber in polymkeric substance is important materials indispensable in insulating material.In synthetic rubber, silicon rubber has comparatively excellent performance, its heat effect when sulfuration is little, elasticity can be kept for a long time in very wide temperature range, also have good electrical insulating property, oxytolerant resistance to deterioration, fast light resistance to deterioration, mildew resistance and chemical stability simultaneously, therefore to be at present widely used in the field such as electric, but it is as macromolecular material, heat conductivility is not fine, cause the motor slot wedge thermotolerance with it makes not to be still very desirable, greatly limit its application in some field.
Summary of the invention
Based on the technical problem that background technology exists, the present invention proposes a kind of motor slot wedge heat resistant insulation composite and preparation method thereof, this preparation method's process is simple, mild condition, the matrix material obtained has good thermal diffusivity, and thermotolerance and excellent insulation performance, long service life.
A kind of motor slot wedge heat resistant insulation composite that the present invention proposes, its raw material comprises following component by weight: 100 parts, silicon rubber, Low Density Polyethylene 10-30 part, dodecafluoroheptyl methacrylate 2-8 part, terpolymer EP rubber 10-25 part, hydrogenated nitrile-butadiene rubber 3-10 part, polyacetylene 0.5-3 part, nano-calcium carbonate 2-5 part, nano imvite 3-8 part, silicon carbide 1-8 part, carbon fiber 2-10 part, nm-class boron nitride 3-10 part, metal compounded mix 10-25 part, polyethylene wax 0.5-2 part, clorafin 1-3 part, coupling agent 2-5 part, stearic acid 0.1-0.8 part, stannous octoate 2-9 part, decabromodiphynly oxide 1-5 part, expanded graphite 2-10 part, Lanthanum Stearate 1-3.5 part, vulcanizing agent 1-3.5 part,
Wherein, described metal compounded mix is prepared according to following technique: add in 20-30 part dehydrated alcohol by 3-10 part magnesium oxide, 1-3 part aluminium hydroxide, 3-10 part zinc oxide, 5-15 part nano aluminum nitride and 1-4 part nano-cerium oxide by weight, add the positive decyl Trimethoxy silane of 1-2 part and 0.5-3 part vinyltriethoxysilane after stirring, after stirring 2-3.5h, filtration, drying obtain described metal compounded mix.
In a particular embodiment, a kind of motor slot wedge heat resistant insulation composite that the present invention proposes, in its raw material, the weight part of silicon rubber is 100 parts; The weight part of Low Density Polyethylene can be 10,11,12,13,13.5,15,16,17,18,19,21,22,23,24,25,26,26.3,27,28,28.6,29,29.3,30 parts; The weight part of dodecafluoroheptyl methacrylate can be 2,2.3,2.8,3,3.2,4,4.5,5,5.3,6,6.7,7,7.6,8 parts; The weight part of terpolymer EP rubber can be 10,12,13,13.5,14,14.6,15,17,18,20,21,23,23.4,24,24.6,25 parts; The weight part of hydrogenated nitrile-butadiene rubber can be 3,3.4,4,4.2,5,5.6,6,6.3,7,7.8,9,9.3,10 parts; The weight part of polyacetylene can be 0.5,0.6,0.7,0.8,0.9,1,1.2,1.5,1.6,1.8,1.9,2,2.3,2.4,2.8,2.9,3 part; The weight part of nano-calcium carbonate can be 2,2.3,2.6,2.8,3,3.2,3.8,4,4.5,5 parts; The weight part of nano imvite can be 3,3.2 .8,4,4.2,5,5.5,5.6,6,6.3,7,7.4,8 parts; The weight part of silicon carbide can be 1,2,3,3.4,4,4.5,6,6.3,7,7.4,8 part; The weight part of carbon fiber can be 2,3,4,5,6,6.3,7,7.5,8,8.6,9,9.3,10 parts; The weight part of nm-class boron nitride can be 3,4,5,6,6.3,7,8,8.6,9,9.3,10 parts; The weight part of metal compounded mix can be 10,12,13,15,16,17,18,18.9,19,20,21,23,23.4,24,24.6,25 parts; The weight part of polyethylene wax can be 0.5,0.6,0.8,0.9,1,1.2,1.3,1.5,1.8,1.9,2 part; The weight part of clorafin can be 1,1.2,1.5,1.8,2,2.2,2.6,2.7,3 part; The weight part of coupling agent can be 2,2.3,2.8,3,3.4,3.7,4,4.2,4.7,5 parts; Stearic weight part can be 0.1,0.2,0.3,0.4,0.5,0.6,0.7,0.8 part; The weight part of stannous octoate can be 2,2.6,3,3.4,4,4.5,5,5.3,6,6.3,7,8,8.5,9 parts; The weight part of decabromodiphynly oxide can be 1,1.8,2,2.3,2.8,3,3.7,4,4.6,5 part; The weight part of expanded graphite can be 2,3,4,5.6,6,6.5,7,8,8.5,9,9.3,10 parts; The weight part of Lanthanum Stearate can be 1,1.2,1.8,2,2.1,2.5,2.6,2.7,3,3.2,3.4,3.5 part; The weight part of vulcanizing agent can be 1,1.2,1.8,1.9,2,2.3,2.6,2.8,2.9,3,3.4,3.5 part.
Preferably, its raw material comprises following component by weight: 100 parts, silicon rubber, Low Density Polyethylene 15-22 part, dodecafluoroheptyl methacrylate 4-7 part, terpolymer EP rubber 17-20 part, hydrogenated nitrile-butadiene rubber 5-7 part, polyacetylene 1.2-1.8 part, nano-calcium carbonate 3.2-4 part, nano imvite 5.5-7 part, silicon carbide 5-7 part, carbon fiber 7-9 part, nm-class boron nitride 6-8 part, metal compounded mix 17-20 part, polyethylene wax 1.2-1.8 part, clorafin 2.2-2.7 part, coupling agent 3-3.7 part, stearic acid 0.5-0.7 part, stannous octoate 4.5-7 part, decabromodiphynly oxide 3-3.7 part, expanded graphite 5.6-6.5 part, Lanthanum Stearate 2-2.7 part, vulcanizing agent 1.9-2.6 part.
Preferably, described metal compounded mix is prepared according to following technique: add in 24-26 part dehydrated alcohol by 7-8 part magnesium oxide, 2-2.7 part aluminium hydroxide, 6-7 part zinc oxide, 9-12 part nano aluminum nitride and 2-3.5 part nano-cerium oxide by weight, add the positive decyl Trimethoxy silane of 1.4-1.7 part and 1.7-2.3 part vinyltriethoxysilane after stirring, after stirring 2.6-3h, filtration, drying obtain described metal compounded mix, in the preparation process of metal compounded mix, have selected aluminium hydroxide, zinc oxide, nano aluminum nitride and nano-cerium oxide coordinate as metallic stuffing, and utilize positive decyl Trimethoxy silane and vinyltriethoxysilane to carry out modification to it, positive decyl Trimethoxy silane and vinyltriethoxysilane is introduced on the surface of metallic stuffing, add in system, be uniformly dispersed in system, and vinyl wherein can react with the unsaturated link(age) in system, improve the cohesive strength of metal compounded mix and matrix, coordinate with polyacetylene, improve the thermal conductivity of matrix material, tensile strength and elongation at break, improve the ageing resistance of matrix material simultaneously.
Preferably, described metal compounded mix is prepared according to following technique: add in 25 parts of dehydrated alcohols by 7.6 parts of magnesium oxide, 2.3 parts of aluminium hydroxides, 6.5 parts of zinc oxide, 10 parts of nano aluminum nitrides and 2.8 parts of nano-cerium oxides by weight, add 1.5 parts of positive decyl Trimethoxy silanes and 2 parts of vinyltriethoxysilanes after stirring, after stirring 2.8h, filtration, drying obtain described metal compounded mix;
Preferably, described silicon rubber is one or more the mixture in methyl vinyl silicon kautschuk, methyl phenyl vinyl silicone rubber rubber, dimethyl silicone rubber rubber and crude rubber of fluorinated silicone rubber.
Preferably, the median size of described nano-calcium carbonate is 50-85nm; The median size of described nm-class boron nitride is 45-70nm; The median size of described nano aluminum nitride is 50-80nm; The median size of described nano-cerium oxide is 30-50nm; Control nano-calcium carbonate, nm-class boron nitride, nano aluminum nitride and nano-cerium oxide particle diameter, make it in system, define maximum tap density, while maintaining composite materials property, improve the thermal conductivity of matrix material, improve the thermotolerance of matrix material.
Preferably, described vulcanizing agent is that 2,5-dimethyl-2,5-bis-(tert-butyl hydroperoxide) hexane and dicumyl peroxide are by weight the mixture being 1-4:2-6.
The preparation method of a kind of described motor slot wedge heat resistant insulation composite that the present invention also proposes, comprises the following steps:
S1, silicon rubber, Low Density Polyethylene, dodecafluoroheptyl methacrylate, terpolymer EP rubber and hydrogenated nitrile-butadiene rubber added in two roller mill by proportioning, polyacetylene, nano-calcium carbonate, nano imvite, silicon carbide, carbon fiber, nm-class boron nitride, metal compounded mix and expanded graphite is added after bag roller, then add polyethylene wax, clorafin, coupling agent, stearic acid, stannous octoate, decabromodiphynly oxide and Lanthanum Stearate evenly mixing, then add that vulcanizing agent is mixing evenly obtains rubber unvulcanizate;
S2, rubber unvulcanizate is carried out three sections of sulfurations obtain described motor slot wedge heat resistant insulation composite, wherein, the pressure of one step cure is 7-9MPa, the temperature of one step cure is 110-140 DEG C, and the time of one step cure is 15-20min, and the pressure of post vulcanization is 10-12MPa, the temperature of post vulcanization is 160-180 DEG C, the time of post vulcanization is 3-8min, and the temperature of three sections of sulfurations is 150-180 DEG C, and the time of three sections of sulfurations is 2.5-3h.
The motor slot wedge heat resistant insulation composite that the present invention proposes, take silicon rubber as major ingredient, while giving the insulativity of matrix material excellence, also there is good resistance toheat, add Low Density Polyethylene, terpolymer EP rubber and hydrogenated nitrile-butadiene rubber coordinate the properties-correcting agent as silicon rubber, improve the thermotolerance of matrix material, oil-proofness and lower temperature resistance, dodecafluoroheptyl methacrylate adds in system, multipolymer can be obtained with silicon rubber grafting, improve the consistency of each material in system, improve the mechanical property of matrix material, ageing resistance, thermotolerance and processing characteristics, reduce the specific inductivity of matrix material, improve the resistivity of matrix material, improve the insulativity of matrix material, the cooperation of nano-calcium carbonate, nano imvite, silicon carbide, carbon fiber, nm-class boron nitride, metal compounded mix joins in system, silane coupling agent auxiliary under, be uniformly dispersed in system, improve intensity and the toughness of matrix material, coordinate with polyacetylene, by regulating its ratio, it is made to contact with each other in system, define similar netted or chain-like structure, while the insulativity ensureing matrix material excellence, improve the heat conductivility of matrix material, improve the thermotolerance of matrix material.
Performance Detection is carried out to motor slot wedge heat resistant insulation composite of the present invention, its tensile strength>=7N/mm
2, elongation at break>=250%, volume specific resistance 1.2-1.3 × 10
17Ω .m, velocity of variation≤18% after cooling, thermal conductivity is 1.5-2.8Wm
-1k
-1.
Embodiment
Below, by specific embodiment, technical scheme of the present invention is described in detail.
Embodiment 1
A kind of motor slot wedge heat resistant insulation composite that the present invention proposes, its raw material comprises following component by weight: 100 parts, silicon rubber, Low Density Polyethylene 10 parts, dodecafluoroheptyl methacrylate 8 parts, terpolymer EP rubber 10 parts, hydrogenated nitrile-butadiene rubber 10 parts, polyacetylene 0.5 part, nano-calcium carbonate 5 parts, nano imvite 3 parts, 8 parts, silicon carbide, 2 parts, carbon fiber, nm-class boron nitride 10 parts, metal compounded mix 10 parts, polyethylene wax 2 parts, clorafin 1 part, coupling agent 5 parts, stearic acid 0.1 part, stannous octoate 9 parts, decabromodiphynly oxide 1 part, expanded graphite 10 parts, Lanthanum Stearate 1 part, vulcanizing agent 3.5 parts,
Wherein, described metal compounded mix is prepared according to following technique: add in 20 parts of dehydrated alcohols by 3 parts of magnesium oxide, 1 part of aluminium hydroxide, 10 parts of zinc oxide, 5 parts of nano aluminum nitrides and 4 parts of nano-cerium oxides by weight, add 2 parts of positive decyl Trimethoxy silanes and 0.5 part of vinyltriethoxysilane after stirring, after stirring 3.5h, filtration, drying obtain described metal compounded mix.
The preparation method of a kind of described motor slot wedge heat resistant insulation composite that the present invention proposes, comprises the following steps:
S1, silicon rubber, Low Density Polyethylene, dodecafluoroheptyl methacrylate, terpolymer EP rubber and hydrogenated nitrile-butadiene rubber added in two roller mill by proportioning, polyacetylene, nano-calcium carbonate, nano imvite, silicon carbide, carbon fiber, nm-class boron nitride, metal compounded mix and expanded graphite is added after bag roller, then add polyethylene wax, clorafin, coupling agent, stearic acid, stannous octoate, decabromodiphynly oxide and Lanthanum Stearate evenly mixing, then add that vulcanizing agent is mixing evenly obtains rubber unvulcanizate;
S2, rubber unvulcanizate is carried out three sections of sulfurations obtain described motor slot wedge heat resistant insulation composite, wherein, the pressure of one step cure is 9MPa, the temperature of one step cure is 110 DEG C, and the time of one step cure is 20min, and the pressure of post vulcanization is 10MPa, the temperature of post vulcanization is 180 DEG C, the time of post vulcanization is 3min, and the temperature of three sections of sulfurations is 180 DEG C, and the time of three sections of sulfurations is 2.5h.
Embodiment 2
A kind of motor slot wedge heat resistant insulation composite that the present invention proposes, its raw material comprises following component by weight: methyl vinyl silicon kautschuk 100 parts, Low Density Polyethylene 30 parts, dodecafluoroheptyl methacrylate 2 parts, terpolymer EP rubber 25 parts, hydrogenated nitrile-butadiene rubber 3 parts, polyacetylene 3 parts, nano-calcium carbonate 2 parts, nano imvite 8 parts, 1 part, silicon carbide, 10 parts, carbon fiber, nm-class boron nitride 3 parts, metal compounded mix 25 parts, polyethylene wax 0.5 part, clorafin 3 parts, coupling agent 2 parts, stearic acid 0.8 part, stannous octoate 2 parts, decabromodiphynly oxide 5 parts, expanded graphite 2 parts, Lanthanum Stearate 3.5 parts, vulcanizing agent 1 part,
Wherein, described metal compounded mix is prepared according to following technique: add in 30 parts of dehydrated alcohols by 10 parts of magnesium oxide, 3 parts of aluminium hydroxides, 3 parts of zinc oxide, 15 parts of nano aluminum nitrides and 1 part of nano-cerium oxide by weight, add 1 part of positive decyl Trimethoxy silane and 3 parts of vinyltriethoxysilanes after stirring, after stirring 2h, filtration, drying obtain described metal compounded mix.
The preparation method of a kind of described motor slot wedge heat resistant insulation composite that the present invention also proposes, comprises the following steps:
S1, silicon rubber, Low Density Polyethylene, dodecafluoroheptyl methacrylate, terpolymer EP rubber and hydrogenated nitrile-butadiene rubber added in two roller mill by proportioning, polyacetylene, nano-calcium carbonate, nano imvite, silicon carbide, carbon fiber, nm-class boron nitride, metal compounded mix and expanded graphite is added after bag roller, then add polyethylene wax, clorafin, coupling agent, stearic acid, stannous octoate, decabromodiphynly oxide and Lanthanum Stearate evenly mixing, then add that vulcanizing agent is mixing evenly obtains rubber unvulcanizate;
S2, rubber unvulcanizate is carried out three sections of sulfurations obtain described motor slot wedge heat resistant insulation composite, wherein, the pressure of one step cure is 7MPa, the temperature of one step cure is 140 DEG C, and the time of one step cure is 15min, and the pressure of post vulcanization is 12MPa, the temperature of post vulcanization is 160 DEG C, the time of post vulcanization is 8min, and the temperature of three sections of sulfurations is 150 DEG C, and the time of three sections of sulfurations is 3h.
Embodiment 3
A kind of motor slot wedge heat resistant insulation composite that the present invention proposes, its raw material comprises following component by weight: methyl phenyl vinyl silicone rubber rubber 75 parts, dimethyl silicone rubber rubber 25 parts, Low Density Polyethylene 15 parts, dodecafluoroheptyl methacrylate 7 parts, terpolymer EP rubber 17 parts, hydrogenated nitrile-butadiene rubber 7 parts, polyacetylene 1.2 parts, nano-calcium carbonate 4 parts, nano imvite 5.5 parts, 7 parts, silicon carbide, 7 parts, carbon fiber, nm-class boron nitride 8 parts, metal compounded mix 17 parts, polyethylene wax 1.8 parts, clorafin 2.2 parts, coupling agent 3.7 parts, stearic acid 0.5 part, stannous octoate 7 parts, decabromodiphynly oxide 3 parts, expanded graphite 6.5 parts, Lanthanum Stearate 2 parts, vulcanizing agent 2.6 parts,
Wherein, described metal compounded mix is prepared according to following technique: add in 26 parts of dehydrated alcohols by 7 parts of magnesium oxide, 2.7 parts of aluminium hydroxides, 6 parts of zinc oxide, 12 parts of nano aluminum nitrides and 2 parts of nano-cerium oxides by weight, add 1.4 parts of positive decyl Trimethoxy silanes and 2.3 parts of vinyltriethoxysilanes after stirring, after stirring 2.6h, filtration, drying obtain described metal compounded mix;
The median size of described nano-calcium carbonate is 50nm; The median size of described nm-class boron nitride is 70nm; The median size of described nano aluminum nitride is 50nm; The median size of described nano-cerium oxide is 50nm;
Described vulcanizing agent is that 2,5-dimethyl-2,5-bis-(tert-butyl hydroperoxide) hexane and dicumyl peroxide are by weight the mixture being 1:2.
The preparation method of a kind of described motor slot wedge heat resistant insulation composite that the present invention proposes, comprises the following steps:
S1, silicon rubber, Low Density Polyethylene, dodecafluoroheptyl methacrylate, terpolymer EP rubber and hydrogenated nitrile-butadiene rubber added in two roller mill by proportioning, polyacetylene, nano-calcium carbonate, nano imvite, silicon carbide, carbon fiber, nm-class boron nitride, metal compounded mix and expanded graphite is added after bag roller, then add polyethylene wax, clorafin, coupling agent, stearic acid, stannous octoate, decabromodiphynly oxide and Lanthanum Stearate evenly mixing, then add that vulcanizing agent is mixing evenly obtains rubber unvulcanizate;
S2, rubber unvulcanizate is carried out three sections of sulfurations obtain described motor slot wedge heat resistant insulation composite, wherein, the pressure of one step cure is 8.4MPa, the temperature of one step cure is 118 DEG C, and the time of one step cure is 19min, and the pressure of post vulcanization is 11MPa, the temperature of post vulcanization is 168 DEG C, the time of post vulcanization is 6min, and the temperature of three sections of sulfurations is 158 DEG C, and the time of three sections of sulfurations is 2.8h.
Embodiment 4
A kind of motor slot wedge heat resistant insulation composite that the present invention proposes, its raw material comprises following component by weight: methyl vinyl silicon kautschuk 45 parts, methyl phenyl vinyl silicone rubber rubber 20 parts, dimethyl silicone rubber rubber 20 parts, crude rubber of fluorinated silicone rubber 15 parts, Low Density Polyethylene 22 parts, dodecafluoroheptyl methacrylate 4 parts, terpolymer EP rubber 20 parts, hydrogenated nitrile-butadiene rubber 5 parts, polyacetylene 1.8 parts, nano-calcium carbonate 3.2 parts, nano imvite 7 parts, 5 parts, silicon carbide, 9 parts, carbon fiber, nm-class boron nitride 6 parts, metal compounded mix 20 parts, polyethylene wax 1.2 parts, clorafin 2.7 parts, coupling agent 3 parts, stearic acid 0.7 part, stannous octoate 4.5 parts, decabromodiphynly oxide 3.7 parts, expanded graphite 5.6 parts, Lanthanum Stearate 2.7 parts, vulcanizing agent 1.9 parts,
Wherein, described metal compounded mix is prepared according to following technique: add in 24 parts of dehydrated alcohols by 8 parts of magnesium oxide, 2 parts of aluminium hydroxides, 7 parts of zinc oxide, 9 parts of nano aluminum nitrides and 3.5 parts of nano-cerium oxides by weight, add 1.7 parts of positive decyl Trimethoxy silanes and 1.7 parts of vinyltriethoxysilanes after stirring, after stirring 3h, filtration, drying obtain described metal compounded mix;
The median size of described nano-calcium carbonate is 85nm; The median size of described nm-class boron nitride is 45nm; The median size of described nano aluminum nitride is 80nm; The median size of described nano-cerium oxide is 30nm;
Described vulcanizing agent is that 2,5-dimethyl-2,5-bis-(tert-butyl hydroperoxide) hexane and dicumyl peroxide are by weight the mixture being 4:6.
The preparation method of a kind of described motor slot wedge heat resistant insulation composite that the present invention proposes, comprises the following steps:
S1, silicon rubber, Low Density Polyethylene, dodecafluoroheptyl methacrylate, terpolymer EP rubber and hydrogenated nitrile-butadiene rubber added in two roller mill by proportioning, polyacetylene, nano-calcium carbonate, nano imvite, silicon carbide, carbon fiber, nm-class boron nitride, metal compounded mix and expanded graphite is added after bag roller, then add polyethylene wax, clorafin, coupling agent, stearic acid, stannous octoate, decabromodiphynly oxide and Lanthanum Stearate evenly mixing, then add that vulcanizing agent is mixing evenly obtains rubber unvulcanizate;
S2, rubber unvulcanizate is carried out three sections of sulfurations obtain described motor slot wedge heat resistant insulation composite, wherein, the pressure of one step cure is 7.6MPa, the temperature of one step cure is 135 DEG C, and the time of one step cure is 17min, and the pressure of post vulcanization is 10.8MPa, the temperature of post vulcanization is 175 DEG C, the time of post vulcanization is 5min, and the temperature of three sections of sulfurations is 170 DEG C, and the time of three sections of sulfurations is 2.6h.
Embodiment 5
A kind of motor slot wedge heat resistant insulation composite that the present invention proposes, its raw material comprises following component by weight: methyl phenyl vinyl silicone rubber rubber 100 parts, Low Density Polyethylene 18 parts, dodecafluoroheptyl methacrylate 5.3 parts, terpolymer EP rubber 21 parts, hydrogenated nitrile-butadiene rubber 9.3 parts, polyacetylene 2.8 parts, nano-calcium carbonate 4.5 parts, nano imvite 7 parts, 6.3 parts, silicon carbide, 8 parts, carbon fiber, nm-class boron nitride 9.3 parts, metal compounded mix 20 parts, polyethylene wax 1.9 parts, clorafin 2.6 parts, coupling agent 4.2 parts, stearic acid 0.5 part, stannous octoate 7 parts, decabromodiphynly oxide 3 parts, expanded graphite 8.5 parts, Lanthanum Stearate 3.2 parts, vulcanizing agent 2.3 parts,
Wherein, described metal compounded mix is prepared according to following technique: add in 25 parts of dehydrated alcohols by 7.6 parts of magnesium oxide, 2.3 parts of aluminium hydroxides, 6.5 parts of zinc oxide, 10 parts of nano aluminum nitrides and 2.8 parts of nano-cerium oxides by weight, add 1.5 parts of positive decyl Trimethoxy silanes and 2 parts of vinyltriethoxysilanes after stirring, after stirring 2.8h, filtration, drying obtain described metal compounded mix;
The median size of described nano-calcium carbonate is 70nm; The median size of described nm-class boron nitride is 60nm; The median size of described nano aluminum nitride is 75nm; The median size of described nano-cerium oxide is 40nm;
Described vulcanizing agent is that 2,5-dimethyl-2,5-bis-(tert-butyl hydroperoxide) hexane and dicumyl peroxide are by weight the mixture being 3:5.
The preparation method of a kind of described motor slot wedge heat resistant insulation composite that the present invention proposes, comprises the following steps:
S1, silicon rubber, Low Density Polyethylene, dodecafluoroheptyl methacrylate, terpolymer EP rubber and hydrogenated nitrile-butadiene rubber added in two roller mill by proportioning, polyacetylene, nano-calcium carbonate, nano imvite, silicon carbide, carbon fiber, nm-class boron nitride, metal compounded mix and expanded graphite is added after bag roller, then add polyethylene wax, clorafin, coupling agent, stearic acid, stannous octoate, decabromodiphynly oxide and Lanthanum Stearate evenly mixing, then add that vulcanizing agent is mixing evenly obtains rubber unvulcanizate;
S2, rubber unvulcanizate is carried out three sections of sulfurations obtain described motor slot wedge heat resistant insulation composite, wherein, the pressure of one step cure is 7.8MPa, the temperature of one step cure is 130 DEG C, and the time of one step cure is 18min, and the pressure of post vulcanization is 11.6MPa, the temperature of post vulcanization is 170 DEG C, the time of post vulcanization is 5min, and the temperature of three sections of sulfurations is 170 DEG C, and the time of three sections of sulfurations is 2.8h.
The above; be only the present invention's preferably embodiment; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (8)
1. a motor slot wedge heat resistant insulation composite, it is characterized in that, its raw material comprises following component by weight: 100 parts, silicon rubber, Low Density Polyethylene 10-30 part, dodecafluoroheptyl methacrylate 2-8 part, terpolymer EP rubber 10-25 part, hydrogenated nitrile-butadiene rubber 3-10 part, polyacetylene 0.5-3 part, nano-calcium carbonate 2-5 part, nano imvite 3-8 part, silicon carbide 1-8 part, carbon fiber 2-10 part, nm-class boron nitride 3-10 part, metal compounded mix 10-25 part, polyethylene wax 0.5-2 part, clorafin 1-3 part, coupling agent 2-5 part, stearic acid 0.1-0.8 part, stannous octoate 2-9 part, decabromodiphynly oxide 1-5 part, expanded graphite 2-10 part, Lanthanum Stearate 1-3.5 part, vulcanizing agent 1-3.5 part,
Wherein, described metal compounded mix is prepared according to following technique: add in 20-30 part dehydrated alcohol by 3-10 part magnesium oxide, 1-3 part aluminium hydroxide, 3-10 part zinc oxide, 5-15 part nano aluminum nitride and 1-4 part nano-cerium oxide by weight, add the positive decyl Trimethoxy silane of 1-2 part and 0.5-3 part vinyltriethoxysilane after stirring, after stirring 2-3.5h, filtration, drying obtain described metal compounded mix.
2. motor slot wedge heat resistant insulation composite according to claim 1, it is characterized in that, its raw material comprises following component by weight: 100 parts, silicon rubber, Low Density Polyethylene 15-22 part, dodecafluoroheptyl methacrylate 4-7 part, terpolymer EP rubber 17-20 part, hydrogenated nitrile-butadiene rubber 5-7 part, polyacetylene 1.2-1.8 part, nano-calcium carbonate 3.2-4 part, nano imvite 5.5-7 part, silicon carbide 5-7 part, carbon fiber 7-9 part, nm-class boron nitride 6-8 part, metal compounded mix 17-20 part, polyethylene wax 1.2-1.8 part, clorafin 2.2-2.7 part, coupling agent 3-3.7 part, stearic acid 0.5-0.7 part, stannous octoate 4.5-7 part, decabromodiphynly oxide 3-3.7 part, expanded graphite 5.6-6.5 part, Lanthanum Stearate 2-2.7 part, vulcanizing agent 1.9-2.6 part.
3. motor slot wedge heat resistant insulation composite according to claim 1 or 2, it is characterized in that, described metal compounded mix is prepared according to following technique: add in 24-26 part dehydrated alcohol by 7-8 part magnesium oxide, 2-2.7 part aluminium hydroxide, 6-7 part zinc oxide, 9-12 part nano aluminum nitride and 2-3.5 part nano-cerium oxide by weight, add the positive decyl Trimethoxy silane of 1.4-1.7 part and 1.7-2.3 part vinyltriethoxysilane after stirring, after stirring 2.6-3h, filtration, drying obtain described metal compounded mix.
4. motor slot wedge heat resistant insulation composite according to any one of claim 1-3, it is characterized in that, described metal compounded mix is prepared according to following technique: add in 25 parts of dehydrated alcohols by 7.6 parts of magnesium oxide, 2.3 parts of aluminium hydroxides, 6.5 parts of zinc oxide, 10 parts of nano aluminum nitrides and 2.8 parts of nano-cerium oxides by weight, add 1.5 parts of positive decyl Trimethoxy silanes and 2 parts of vinyltriethoxysilanes after stirring, after stirring 2.8h, filtration, drying obtain described metal compounded mix.
5. motor slot wedge heat resistant insulation composite according to any one of claim 1-4, it is characterized in that, described silicon rubber is one or more the mixture in methyl vinyl silicon kautschuk, methyl phenyl vinyl silicone rubber rubber, dimethyl silicone rubber rubber and crude rubber of fluorinated silicone rubber.
6. motor slot wedge heat resistant insulation composite according to any one of claim 1-5, is characterized in that, the median size of described nano-calcium carbonate is 50-85nm; The median size of described nm-class boron nitride is 45-70nm; The median size of described nano aluminum nitride is 50-80nm; The median size of described nano-cerium oxide is 30-50nm.
7. motor slot wedge heat resistant insulation composite according to any one of claim 1-6, it is characterized in that, described vulcanizing agent is that 2,5-dimethyl-2,5-bis-(tert-butyl hydroperoxide) hexane and dicumyl peroxide are by weight the mixture being 1-4:2-6.
8. the preparation method of motor slot wedge heat resistant insulation composite according to any one of claim 1-7, is characterized in that, comprise the following steps:
S1, silicon rubber, Low Density Polyethylene, dodecafluoroheptyl methacrylate, terpolymer EP rubber and hydrogenated nitrile-butadiene rubber added in two roller mill by proportioning, polyacetylene, nano-calcium carbonate, nano imvite, silicon carbide, carbon fiber, nm-class boron nitride, metal compounded mix and expanded graphite is added after bag roller, then add polyethylene wax, clorafin, coupling agent, stearic acid, stannous octoate, decabromodiphynly oxide and Lanthanum Stearate evenly mixing, then add that vulcanizing agent is mixing evenly obtains rubber unvulcanizate;
S2, rubber unvulcanizate is carried out three sections of sulfurations obtain described motor slot wedge heat resistant insulation composite, wherein, the pressure of one step cure is 7-9MPa, the temperature of one step cure is 110-140 DEG C, and the time of one step cure is 15-20min, and the pressure of post vulcanization is 10-12MPa, the temperature of post vulcanization is 160-180 DEG C, the time of post vulcanization is 3-8min, and the temperature of three sections of sulfurations is 150-180 DEG C, and the time of three sections of sulfurations is 2.5-3h.
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| CN113683891B (en) * | 2021-09-15 | 2023-01-31 | 湖南翰坤实业有限公司 | Insulating material and preparation method thereof |
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